Posted: Jan 15 2007 at 8:47pm | IP Logged

I experience the same problem. Very audible when turning slowly (left or right).  I often also hear it when braking.  No visits to the shop though.  the sound has not intensified in the year and half i have owned.  i will have to research tortion arms.  sounds like a nissan design flaw. keep posted.

Posted: Jan 19 2007 at 9:05am | IP Logged

I had the EXACT same problem. 

It's a 2 part problem one being the dealer, the other being a bolt.

I was on good terms with my dealer so they would "grease" my Torsion bar for Free everytime I came in for an oil change.  Though I couldn't believe that was their answer to the problem.

But I found out later on, there's a bolt somewhere under the vehicle that comes loose, and just adding a lock-washer on there solves the problem I believe. 

Here is my old thread, it must have been on the 4x4parts.com forum read about the bolt.  I traded my Frontier in a couple of years back, and checked everything out once, but didn't really find anything.  But there was a few good tips of places to look.

http://www.nissanfrontier.org/forum_posts.asp?TID=66&KW= Popping+Noise